Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 700 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) cutting the lemon (b) dipping the cotton bud (c) plugging in the iron (d) putting the iron away
3. 3.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a balloon (c) a battery cell (d) a funnel
4. 4.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a dropper or spoon (c) a magnet (d) white paper strips
5. 5.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so cream does not spill (c) so it turns yellow (d) so it gets hot
6. 6.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) lemon juice (c) a cotton bud (d) a mirror
7. 7.True or false: sugar is needed for the fizzy balloon. (a) False (b) True
8. 8.📘 Is the fizzing a sign that a new substance is made? (a) it is only dissolving (b) no, nothing changes (c) yes, a new gas forms (d) it is only melting
9. 9.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) warm water (d) a battery cell
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) a mirror (d) lemon juice
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is what we measure. (a) True (b) False
12. 12.🌱 Which of these is not needed for a seed to sprout? (a) air (b) water (c) soil (d) warmth
13. 13.🪴 Which part of a plant does this job: hold up the leaves? (a) leaves (b) flower (c) stem (d) roots
14. 14.🌱 What comes out of a moong seed first when it sprouts? (a) a thorn (b) a flower (c) a fruit (d) a tiny root
15. 15.🌱 Is sugar needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.True or false: folding paper is a change that cannot be undone. (a) False (b) True
19. 19.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) a white party dress (d) your school uniform
20. 20.🌱 Which of these is needed for a seed to sprout? (a) sunlight (b) sugar (c) salt (d) water
21. 21.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a rolling pin (b) a pressure cooker (c) a mathani (churner) (d) a sieve
22. 22.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) salt (d) sunlight
23. 23.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
24. 24.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) no butter forms (c) it turns blue (d) more butter forms
25. 25.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they melt (b) yes, they sprout (c) they turn to stones (d) no, never
26. 26.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) lick your fingers (c) skip washing (d) rub your eyes
27. 27.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
28. 28.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
29. 29.🔍 Which is the odd one out? (a) vinegar (b) plain water (c) lemon juice (d) baking soda water
30. 30.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) reading the message (c) writing the message (d) cutting the lemon
31. 31.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) putting the iron away (b) ironing the paper (c) plugging in the iron (d) writing the message
33. 33.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a clean glass (c) muddy water (d) a balloon
34. 34.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) air from outside (d) carbon dioxide gas
35. 35.True or false: hold the plant in soil is a job of the roots. (a) True (b) False
36. 36.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
37. 37.🫧 Which of these is an acid? (a) vinegar (b) plain water (c) baking soda water (d) detergent water
38. 38.True or false: gravel from fine sand is done by handpicking. (a) False (b) True
39. 39.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) with sharp wire (c) gently, not too tight (d) as tight as possible

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